diff --git a/poetry.lock b/poetry.lock
index 7cf9592..4ef864a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -17,10 +17,10 @@ python-versions = "*"
 [[package]]
 name = "protobuf"
 version = "3.18.3"
-description = ""
+description = "Protocol Buffers"
 category = "main"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.5"
 
 [[package]]
 name = "PyYAML"
@@ -60,7 +60,7 @@ python-versions = ">=3.7"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "4317f266aaae4ed073ce9744d8e59259ba70942aa5c946265cf010141161b667"
+content-hash = "754808d3da350cb48a43c9295f4e373f5cc3a13b2797fd4fe4173ea7aba62d1c"
 
 [metadata.files]
 numpy = [
@@ -97,20 +97,27 @@ nvidia-ml-py3 = [
     {file = "nvidia-ml-py3-7.352.0.tar.gz", hash = "sha256:390f02919ee9d73fe63a98c73101061a6b37fa694a793abf56673320f1f51277"},
 ]
 protobuf = [
-    {file = "protobuf-4.21.6-cp310-abi3-win32.whl", hash = "sha256:49f88d56a9180dbb7f6199c920f5bb5c1dd0172f672983bb281298d57c2ac8eb"},
-    {file = "protobuf-4.21.6-cp310-abi3-win_amd64.whl", hash = "sha256:7a6cc8842257265bdfd6b74d088b829e44bcac3cca234c5fdd6052730017b9ea"},
-    {file = "protobuf-4.21.6-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:ba596b9ffb85c909fcfe1b1a23136224ed678af3faf9912d3fa483d5f9813c4e"},
-    {file = "protobuf-4.21.6-cp37-abi3-manylinux2014_aarch64.whl", hash = "sha256:4143513c766db85b9d7c18dbf8339673c8a290131b2a0fe73855ab20770f72b0"},
-    {file = "protobuf-4.21.6-cp37-abi3-manylinux2014_x86_64.whl", hash = "sha256:b6cea204865595a92a7b240e4b65bcaaca3ad5d2ce25d9db3756eba06041138e"},
-    {file = "protobuf-4.21.6-cp37-cp37m-win32.whl", hash = "sha256:9666da97129138585b26afcb63ad4887f602e169cafe754a8258541c553b8b5d"},
-    {file = "protobuf-4.21.6-cp37-cp37m-win_amd64.whl", hash = "sha256:308173d3e5a3528787bb8c93abea81d5a950bdce62840d9760effc84127fb39c"},
-    {file = "protobuf-4.21.6-cp38-cp38-win32.whl", hash = "sha256:aa29113ec901281f29d9d27b01193407a98aa9658b8a777b0325e6d97149f5ce"},
-    {file = "protobuf-4.21.6-cp38-cp38-win_amd64.whl", hash = "sha256:8f9e60f7d44592c66e7b332b6a7b4b6e8d8b889393c79dbc3a91f815118f8eac"},
-    {file = "protobuf-4.21.6-cp39-cp39-win32.whl", hash = "sha256:80e6540381080715fddac12690ee42d087d0d17395f8d0078dfd6f1181e7be4c"},
-    {file = "protobuf-4.21.6-cp39-cp39-win_amd64.whl", hash = "sha256:77b355c8604fe285536155286b28b0c4cbc57cf81b08d8357bf34829ea982860"},
-    {file = "protobuf-4.21.6-py2.py3-none-any.whl", hash = "sha256:07a0bb9cc6114f16a39c866dc28b6e3d96fa4ffb9cc1033057412547e6e75cb9"},
-    {file = "protobuf-4.21.6-py3-none-any.whl", hash = "sha256:c7c864148a237f058c739ae7a05a2b403c0dfa4ce7d1f3e5213f352ad52d57c6"},
-    {file = "protobuf-4.21.6.tar.gz", hash = "sha256:6b1040a5661cd5f6e610cbca9cfaa2a17d60e2bb545309bc1b278bb05be44bdd"},
+    {file = "protobuf-3.18.3-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:370a6b885e94adda021d4cbe43accdfbf6a02af651a0be337a28906a3fa77f3d"},
+    {file = "protobuf-3.18.3-cp36-cp36m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6741d7d1cfcbdd6cf610f38b7976cf8c0b41022203555298925e4061b6616608"},
+    {file = "protobuf-3.18.3-cp36-cp36m-win32.whl", hash = "sha256:3149c373e9b7ce296bb24d42a3eb677d620185b5dff2c390b2cf57baf79afdc1"},
+    {file = "protobuf-3.18.3-cp36-cp36m-win_amd64.whl", hash = "sha256:850da2072d98c6e576b7eb29734cdde6fd9f5d157e43d7818d79f4b373ef5d51"},
+    {file = "protobuf-3.18.3-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:0c44e01f74109decea196b5b313b08edb5316df77313995594a6981e95674259"},
+    {file = "protobuf-3.18.3-cp37-cp37m-manylinux2014_aarch64.whl", hash = "sha256:85d1fb5ff1d638a0045bbe4f01a8f287023aa4f2b29011445b1be0edc74a2103"},
+    {file = "protobuf-3.18.3-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:cde2a73b03049b904dbc5d0f500b97e11abb4109dbe2940e6a1595e2eef4e8a9"},
+    {file = "protobuf-3.18.3-cp37-cp37m-win32.whl", hash = "sha256:b03966ca4d1aa7850f5bf0d841c22a8eeb6ce091f77e585ffeb8b95a6b0a96c4"},
+    {file = "protobuf-3.18.3-cp37-cp37m-win_amd64.whl", hash = "sha256:d52a687e2c74c40f45abd6906f833d4e40f0f8cfa4226a80e4695fedafe6c57e"},
+    {file = "protobuf-3.18.3-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:700787cb56b4cb7b8ed5f7d197b9d8f30080f257f3c7431eec1fdd8060660929"},
+    {file = "protobuf-3.18.3-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:e9bffd52d6ee039a1cafb72475b2900c6fd0f0dca667fb7a09af0a3e119e78cb"},
+    {file = "protobuf-3.18.3-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8117b52c2531e4033f7d02b9be5a78564da41a8b02c255e1b731ad4bd75e7dc0"},
+    {file = "protobuf-3.18.3-cp38-cp38-win32.whl", hash = "sha256:15cdecb0d192ab5f17cdc21a9c0ae7b5c6c4451e42c8a888a4f3344c190e369c"},
+    {file = "protobuf-3.18.3-cp38-cp38-win_amd64.whl", hash = "sha256:e68ad00695547d9397dd14abd3efba23cb31cef67228f4512d41396971889812"},
+    {file = "protobuf-3.18.3-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:474247630834f93214fafce49d2ee6ff4c036c8c5382b88432b7eae6f08f131b"},
+    {file = "protobuf-3.18.3-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:a7f91a4e5bf3cc58b2830c9cb01b04ac5e211c288048e9296cd407ec0455fb89"},
+    {file = "protobuf-3.18.3-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6380aae2683d0d1b41199e591c8ba06f867e8a778d44309af87073c1b34a9f3a"},
+    {file = "protobuf-3.18.3-cp39-cp39-win32.whl", hash = "sha256:98d414513ec44bb3ba77ebdeffcbbe6ebbf3630c767d37a285890c2414fdd4e2"},
+    {file = "protobuf-3.18.3-cp39-cp39-win_amd64.whl", hash = "sha256:93bca9aaeee8008e15696c2a6b5e56b992da03f9d237ff54310e397d635f8305"},
+    {file = "protobuf-3.18.3-py2.py3-none-any.whl", hash = "sha256:abbcb8ecd19cfb729b9b71f9a453e37c0c1c017be4bff47804ff25150685386d"},
+    {file = "protobuf-3.18.3.tar.gz", hash = "sha256:196a153e487c0e20d62259872bbf2e1c4fa18e2ce97e20984fcbf9d8b151058d"},
 ]
 PyYAML = [
     {file = "PyYAML-6.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:d4db7c7aef085872ef65a8fd7d6d09a14ae91f691dec3e87ee5ee0539d516f53"},
@@ -120,6 +127,13 @@ PyYAML = [
     {file = "PyYAML-6.0-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:f84fbc98b019fef2ee9a1cb3ce93e3187a6df0b2538a651bfb890254ba9f90b5"},
     {file = "PyYAML-6.0-cp310-cp310-win32.whl", hash = "sha256:2cd5df3de48857ed0544b34e2d40e9fac445930039f3cfe4bcc592a1f836d513"},
     {file = "PyYAML-6.0-cp310-cp310-win_amd64.whl", hash = "sha256:daf496c58a8c52083df09b80c860005194014c3698698d1a57cbcfa182142a3a"},
+    {file = "PyYAML-6.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:d4b0ba9512519522b118090257be113b9468d804b19d63c71dbcf4a48fa32358"},
+    {file = "PyYAML-6.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:81957921f441d50af23654aa6c5e5eaf9b06aba7f0a19c18a538dc7ef291c5a1"},
+    {file = "PyYAML-6.0-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:afa17f5bc4d1b10afd4466fd3a44dc0e245382deca5b3c353d8b757f9e3ecb8d"},
+    {file = "PyYAML-6.0-cp311-cp311-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:dbad0e9d368bb989f4515da330b88a057617d16b6a8245084f1b05400f24609f"},
+    {file = "PyYAML-6.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:432557aa2c09802be39460360ddffd48156e30721f5e8d917f01d31694216782"},
+    {file = "PyYAML-6.0-cp311-cp311-win32.whl", hash = "sha256:bfaef573a63ba8923503d27530362590ff4f576c626d86a9fed95822a8255fd7"},
+    {file = "PyYAML-6.0-cp311-cp311-win_amd64.whl", hash = "sha256:01b45c0191e6d66c470b6cf1b9531a771a83c1c4208272ead47a3ae4f2f603bf"},
     {file = "PyYAML-6.0-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:897b80890765f037df3403d22bab41627ca8811ae55e9a722fd0392850ec4d86"},
     {file = "PyYAML-6.0-cp36-cp36m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:50602afada6d6cbfad699b0c7bb50d5ccffa7e46a3d738092afddc1f9758427f"},
     {file = "PyYAML-6.0-cp36-cp36m-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:48c346915c114f5fdb3ead70312bd042a953a8ce5c7106d5bfb1a5254e47da92"},
diff --git a/pyproject.toml b/pyproject.toml
index edd5af3..b5cf187 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ skyline = "skyline.skyline:main"
 [tool.poetry.dependencies]
 python = "^3.8"
 pyyaml = "*"
-protobuf = "*"
+protobuf = "3.18.3"
 numpy = "^1.22"
 torch = "*"
 nvidia-ml-py3 = "*"